Loading...
2019 Annual Water Quality Report CITY 1 Tigard The City of Tigard provides clean,safe,dependable SUMMER drinking water to the residents of Durham,King City, . . two-thirds of Tigard,and the Tigard Water District. KN4 OE DmT,ON 2019 Annual Water Quality Report We're Here for YOU, v Through Every Emergency o A Message about COVID-19 to Our Water Customers TSP' We have all experienced an unprecedented WE'LL KEEP THE WATER ON public health crisis as a result of the Water is a key element to staying healthy and coronavirus global pandemic. The city safe during the COVID-19 pandemic.We want Inside: has been actively tracking and responding to assure you that water service is reliable and / The Purpose of this Report............2 to this emergency by protecting and will continue to flow to your tap during this ► Tigard Water Source Information..2 isolating essential workers so they can pandemic. safely do their jobs to keep your water safe WE'RE HERE TO HELP / Tigard Water Service Area Map......2 Information on and available 24/7. The Tigard AID Program provides relief from ► cit fees and charges during the COVID-19 Detected Substances......................3 YOUR WATER IS SAFE y g g ► Cryptosporidium ...............................3 The treatment process we use is specifically Pandemic.As our community comes together designed to kill viruses,and this includes in response to COVID-19,the city has taken ► Water Quality Analysis Results......4 g the COVID-19 virus.Find out more from the steps to ensure customers have uninterrupted ► Tigard Water Master Plan access to utility services,assistance is Getting Underway.............................5 Environmental Protection Agency: available to those who need it, and our e_na.gov/coronavirus/coronavirus-and- / Lead...Are You at Risk?...................6 drinking-water-and-wastewater and utilities remain financially sound. ► Definitions..........................................6 the Centers for Disease Control:cdc. ov For more information: ► Immuno-Compromised Notice......6 coronavirus/2019-ncov/phn/water.html www,tigard-or.gov/aid•503-639-3572 ► Drinking Water Contaminants........7 about COVID-19 and drinking water. or UBaid@tigard-or.gov / Source Water Assessment................7 ► Meet Our Staff: Shasta Billings-Beck..........................7 TIGARD Al ► Need an Extension on Backflow Testing?..............................8 / Frequently Asked Questions............8 �x sistance Programs Immediat a Relief Delayed I icroases Where Does f4 Tigard's Wa1From.? S 0 U R C E I N F 0 R M A T 1 0 N In 2019, Tigard's drinking water system delivered WATER SYSTEM INFORMATION water from the Lake Oswego-Tigard Water Treatment Plant with a supplemental summer supply from The Purpose groundwater wells. ofthis Report The Clackamas River begins in Mount Hood National Forest,drawing from a watershed area of 940 square miles.Water is withdrawn from the Clackamas River,pumped through The City of Tigard is responsible for providing a clean,safe,dependable a pipeline buried beneath the Willamette River,and treated at the Lake Oswego Tigard supply of drinking water to over Water Treatment Plant in West Linn.The water goes through a robust treatment process 60,000 residents in the Tigard Water that includes filtration to remove dirt and organisms,ozone to remove substances that Service Area(TWSA).This service affect how the water tastes and smells,and disinfection to kill organisms and protect the area includes the cities of Durham, water as it goes through the distribution system. King City,two-thirds of Tigard and Lake Oswego-Tigard Water Treatment Plant the Tigard Water District.Each entity The treatment plant in West Linn is the heart of the water system,receiving water from has representation on the Water Advisory Board.The board offers the Clackamas River and treating it to exceed safe drinking water standards before being expert guidance to the Tigard City distributed to Lake Oswego and Tigard customers. Council on water-related matters. Groundwater This report summarizes Tigard's During periods of high water demand,Tigard supplements its supply with water from two 2019 water quality data. city-owned aquifer storage and recovery wells,and a native groundwater well. Additional information is included to inform,educate and update consumers on water issues affecting the community. Have a question about this report? / Contact Environmental Program Coordinator f Jennifer Joe at 503-718-2599 orjennifer@tigard-or.gov. 7.1;11 1 I�{'={ l} / Habla Espanol?Este informe 01 T contiene informaci6n importante acerca de su agua potable.Haga que alguien to traduzca para usted,o hable con alguien que to entienda. 2 2019 Water Quality Report • City of Tigard Water Division Information on Yr� DetectedSubstances n 2019, water delivered to to a minimum,while maintaining the required the TWSA met or surpassed levels of chlorine. all regulatory requirements. More than 90 contaminants are regularly Nitrates are formed through the erosion of sampled,both before and after the water is natural deposits,agricultural activity and treated,to ensure it meets the more than 120 leaching of septic tanks. water quality standards for drinking water set Total Coliform Bacteria are naturally CRYPTOSPORIDIUM by the Environmental Protection Agency(EPA) present in the environment and may indicate and the State of Oregon.If a known health- other potentially harmful bacteria may be Cryptosporidium is a micro- related contaminant is not listed inorganism (protozoan) naturally present.Chlorine is added to the drinking water this report,it was not detected in the supply to kill these bacteria. present in surface water supplies drinking water. throughout the world. Surface Turbidity is a measure of the amount water supplies are particularly REGULATED CONTAMINANTS of sediment suspended in the water.This vulnerable if they receive runoff Chlorine is added to maintain disinfection sediment can interfere with disinfection and or pollution from human or requirements throughout the water provide a medium for microbial growth.Large animal wastes. distribution system. storm events can result in increased turbidity. Since wildlife inhabit the Disinfection Byproducts—Haloacetic Clackamas River Watersheds, Acids (HAA) and Total Trihalomethanes To learn about the health effects of managing agencies regularly (THM)form through chemical reactions contaminants, visit the Oregon Health monitor for Cryptosporidium. between chlorine and naturally occurring Authority website at: Occasionally,this monitoring http://Www.oregon.govloha/PH/ detects low levels of organic matter In the Water.The Careful Control HealthyEnvironments/DrinkingWater/Pages/ of the disinfection process keeps byproduct levels index.aspx Cryptosporidium. New national standards further Where Does Tigard's Water Come From?-continued from page 2 reduce the risks of illness from Cryptosporidium. Symptoms How is your drinking water treated? of infection include nausea, The water that goes though the Lake Oswego Tigard Treatment Plant is a conventional treatment abdominal cramps and diarrhea. process which uses ballasted flocculation,intermediate ozone,and biological filtration: Most healthy individuals are able to overcome the disease within • Ballasted flocculation uses micro-sand and a coagulant to settle dirt,sediment and a few weeks. However, immuno- contaminants out of the water. compromised people have more • Ozone is then added to remove unpleasant taste and odor compounds and to provide difficulty and are at greater advanced treatment. risk of developing severe, life • Biological Filtration through a deep bed of granular activated carbon and silica sand threatening illnesses. Immuno- removes any remaining tiny microbes and contaminants,such as cryptosporidium.Beneficial compromised individuals are biological activity removes organic molecules that can produce disinfection byproducts. encouraged to consult their • Filtered water is then disinfected using a small amount of chlorine and the pH is adjusted doctor regarding appropriate to prevent corrosion of household plumbing. precautions to avoid infection. Cryptosporidium must be Watch: The Path to Pure Water ingested for it to cause disease A look inside the heart of the Lake Oswego Tigard Water treatment and may be spread through process.http://Iotigardwater.org/?e=866 means other than drinking water. 3 1 2019 Water Quality Report • City of Tigard Water Division 2019 Water I Analysis Federal standards regulate contaminants . protect Tigard and its water supply partners test for more than 200 regulated and unregulated contaminants. Contaminant MCL 7MCLGTWSA Results Violation? Major Sources Contaminant MCL LOW F Range-+ HIGH Yes/No of Drinking Water A routine sample and a repeat 0 samples out of 900 had Fecal coliform and E.coli Bacteria sample are total coliform positive 0 detectable E.coli or fecal coliform No Human and animal fecal waste and one is also E.coli positive bacteria Must not detect coliform bacteria in 0 samples out of 900 had detect N0 Naturally present in the Total coliform bacteria more than 5%of samples per month 0 able total coliform bacteria environment Turbidity(NTU) Cannot exceed 1 in a single sample NA Highest single measurement: No Erosion of natural deposits or 0.3 in 95%of samples 0.13 INORGANICS Nitrate-Nitrogen(ppm) 10 10 NO 2.05 No Found in natural aquifer deposits;animal waste Ak -7 Total Chlorine Residual Running 4 4 0.77 .97 No Annual Average(ppm) Additive used to disinfect water Total Chlorine Residual NA NA 0.32 1.26 No at Any One Site(ppm) Bromate(ppb) 10 0 ND 1.20 No Byproduct of drinking water treatment with Ozone ECTION BYPRODUCTSHALOACETIC Haloacetic Acids Running 0.060 NA 0.0051 : 0.0066 No Annual Average(ppm) Byproduct of Haloacetic Acids drinking water disinfection at Any One Site(ppm) Not Applicable NA 0.0039 0.0098 No • , RYPR• •UCTS —TOTAL TRIHALOMETHAN Total Trihalomethanes Running 0.080 NA 0.0083 0.0161 No Annual Average(ppm) Byproduct of Total Trihalomethanes at Any One drinking water disinfection Site(ppb) NA NA 0.0065 0.0250 No 90th Number of Sites Exceeding Lead and Copper Action Level Contaminant percentile the Action Level ML MCS' Rule Exceedance Reached Typical Source Copper(ppm) 0.0 0%of samples(0 out of 66)exceeded 13 More than 10%of the homes No the copper action level of 1.3 ppm tested have levels above 1.3 ppm Corrosion household and Lead(ppb) 3.7 3%of samples(2 out of 66)exceeded 0.0 More than 10%of the homes No commercial plumbing the lead action level of 15 ppb tested have levels above 15 ppb AL:action level,MCL:maximum contaminant level,MCLG:maximum contaminant level goal,MRDL:maximum residual disinfectant level,MRDLG.maximum residual disinfectant level goal,MDL:method detection limit,ND:non-detected,NA:not applicable,NTUs:nephelometric turbidity units,ppm:parts per million,mg/L:milligrams per liter, ppb:parts per billion,ug/L:mircograms per liter,pCi/L•picocurries per liter.For complete definitions,see page 6. 4 1 2019 Water Quality Report • City of Tigard Water Division _ . 17 f Tigard Water Master , Getting 1 he Lake Oswego-Tigard Water Partnership is celebrating The plan process will investigate Tigard's growing needs and plan its 4th birthday!As part of this milestone,Tigard has been projects to prepare for that future. updating its Water Master Plan.The Master Plan assesses the current state of the utility,and helps us plan for the future. To preserve the$160 million investment in the joint water plant, As part of the Master Plan we are forecasting 20 years of capital ongoing maintenance and improvements are critical. Tigard's projects,their rate impacts,and addressing future resiliency and aquifer storage and recovery project will also continue to play water supply challenges. a role in providing additional water supply during the peak summer months. The Water Master Plan also presents an opportunity to reflect on the successes of the last four years.Since the Lake Oswego Tigard Additionally,the Master Plan introduces several new capital projects. Water Treatment Plant began operating,water quality and quantity An increase in local water main breaks in the last 10 years will be in both cities has improved. addressed through a new program to proactively replace water mains and prevent breaks before they can occur.Construction will also Beyond delivery of a reliable supply of high-quality water,the begin on a new reservoir in Cach Nature Park to add storage and help partnership between Tigard and Lake Oswego is an example of maintain adequate flow for fire response. smart financial stewardship.By joining resources and jointly operating a state-of-the-art water plant,both cities have ensured Together,these projects will help provide a reliable water supply resiliency and safe water for future generations,while reducing for the future. the unnecessary costs for two cities to operate two separate plants. To learn more about Tigard's Water Master Plan,or see a few of these Two aims of the Master Plan are to protect the community projects up close please visit our website at www.tigard-or.gov/water investment in the joint plant and to add resiliency for the future. You will find videos,updates on the Master Plan,and much more. Mr What is the Water Master Plan? Where are we Today? Looking to the Future 5 1 2019 Water Quality Report • City of Tigard Water Division Lead in the Drinking Water. . . Definitions Are You at Risk? Action Level (AL):The concentration of Parts per Million (ppm)or Milligrams a contaminant,which,if exceeded,triggers per Liter(mg/L):A unit measurement treatment or other requirements that a water describing the level of detected contaminants system must follow. that is one part by weight of analyte to one Maximum Contaminant Level (MCL): million parts by weight of the water sample. i The highest level of a contaminant that is One part per million corresponds to one penny allowed in drinking water.MCLS are set as in$10,000 or approximately one minute in close to the MCLGs as feasible using the best two years.One part per million is equal to available treatment technology. 1,000 parts per billion. Maximum Contaminant Level Goal Parts per Billion (ppb)or Micrograms (MCLG):The level of contaminant in per Liter(µg/L):A unit measurement drinking water below which there is no known describing the level of detected contaminants or expected risk to health.MCLGs allow for a that is one part by weight of analyte to one margin of safety. billion parts by weight of the water sample. If present,elevated levels of lead One part per billion corresponds to one penny Maximum Residual Disinfectant in$10,000,000 or approximately one minute can cause serious health problems, Level (MRDL):The highest level of a in 2,000 years. especially for pregnant women and disinfectant allowed in drinking water.There young children. Lead in drinking is convincing evidence that addition of a Non-detected(ND):Not detected at or water is primarily from materials disinfectant is necessary for control of microbial above the MDL (Method Detection Limit/ contaminants. Level). and components associated with Not Applicable(NA):Not applicable for service lines and home plumbing. Maximum Residual Disinfectant Level Goal (MRDLG):The level of a the specified contaminant. The City of Tigard is responsible drinking water disinfectant below which Treatment Technique(TT):A required there is no known or expected risk of process intended to reduce the level of a for providing high-quality drinking health. MRDLGs do not reflect the benefits contaminant in drinking water. water, but cannot control the variety of the use of disinfectants to control of materials used in plumbing microbial contamination. components.When your water has Nephelometric Turbidity Units(NTUs): been sitting for several hours,you Turbidity is a measure of how clear the can minimize the potential for lead water looks.Turbidity can interfere with exposure by flushing your tap for disinfection and provide a medium for 30 seconds to 2 minutes before microbial growth. using water for drinking or cooking. If you are concerned about lead in SPECIAL NOTICE FOR IMMUNOCOMPROMISED PERSONS your water,you may wish to have Some people may be more vulnerable to contaminants in drinking water than the general your water tested. Information on population.Immuno-compromised persons such as persons with cancer undergoing lead in drinking water,testing chemotherapy,persons who have undergone organ transplants,people with HIV/AIDS or other methods and steps you can take to immune system disorders,some elderly,and infants can be particularly at-risk from infections. minimize exposure is available from These people should seek advice about drinking water from their health-care providers. the Safe Drinking Water Hotline Environmental Protection Agency and Centers for Disease Control and Prevention guidelines (800-426-4791)or www.epa.gov/ on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial safewater/lead. contaminants are available from the Safe Drinking Water Hotline(800-426-4791). 6 1 2019 Water Quality Report • City of Tigard Water Division What the EPA Says about ' Drinking Water Contaminants -r 0 0 r4 In order to ensure that tap water is safe to drink,the US v Environmental Protection Agency(EPA)sets regulatory limits on the amounts of certain contaminants in water provided by public z water systems.The Food and Drug Administration(FDA)sets m 0 limits on contaminants in bottled water,which must provide the Shasta Billings-Beck same protection for public health. What is your job title and what The sources of drinking water(both tap water and bottled water) do you do for the city? include rivers lakes streams ponds reservoirs springs and wells.As I am a Senior Project Engineer,and I water travels over the surface of the land or through the ground,it oversee all the capital improvement dissolves naturally occurring minerals and,in some cases,radioactive material,and can pick up projects for the city's water distribu- substances resulting from the presence of animals or from human activity. tion system.This includes pump stations,reservoirs,wells,water Because of this natural part of water's cycle,drinking water,including bottled water,may lines,etc. contain small amounts of some contaminants.However,the presence of contaminants does not How long have you worked for necessarily indicate that the water poses a health risk. the City of Tigard? I have been with the City of Tigard Contaminants that may be present in source water include: for almost a year and a half.Time flies when you're having fun! ► Microbial contaminants,such as viruses and bacteria,which may come from wildlife or septic systems. What do you like most about your work? ► Inorganic contaminants,such as salts and metals,which can occur naturally or result from One thing I really enjoy about my urban stormwater runoff,industrial or domestic wastewater discharges or farming. work is that no two days are the same.The water distribution system ► Pesticides and herbicides,which may come from a variety of sources such as farming, is a complex web across the City, urban stormwater runoff and home or business use. and I'm still learning new intricacies about it all the time. ► Organic chemical contaminants,including synthetic and volatile organic chemicals,which are byproducts of industrial processes,and may come from gas stations,urban stormwater What is something that people runoff and septic systems. might not know about the work you do. Radioactive contaminants,which can occur naturally. I am getting ready to kick off an amazing project to build a new More information about contaminants andpotential health effects is available from the EPA's reservoir on the western slopes of Safe Drinking Water Hotline(800-426-4791). Bull Mountain. It's been about 10 years since the city last built a new reservoir,and established city's don't usually build reservoirs very TWSA SOURCE WATER ASSESSMENT often,so I'm very excited for the In 2005,the Oregon Health Authority and the Department of Environmental Quality conducted opportunity to be a part of this rare a source water assessment for the aquifer storage and recovery wells and the native groundwater project for the city. well serving the Tigard Water Service Area(TWSA).The purpose of the assessment was to identify Any interesting trivia or tidbits? potential sources of direct and indirect contamination in areas surrounding these wells.The I'm an avid waterskiier, but also assessment identified 50 potential contaminant sources (natural and manmade) that could have an irrational fear of water affect the water quality if managed improperly. where I can't see the bottom.Gotta conquer those fears though for the To view the assessment, contact Environmental Program Coordinator Jennifer Joe at joy of doing what you love! 503-718-2599 orjennifer@tigard-or.gov. 7 1 2019 Water Quality Report • City of Tigard Water Division City of Tigard PRESRTSTD REQUEST AN EXTENSION: PUBLIC WORKS DEPARTMENT U.S.POSTAGE 13125 SW Hall Blvd. PAID Backflow Testing PORTLAND,OR Tigard,OR 97223 PERMIT#1350 Tigard Water Service Area customers can request an extension to September 1, 2020 by contacting: Hung Nguyen, Cross Connection Specialist * * * * * * ECRWSS POSTAL CUSTOMER Email: hung@tigard-or.gov Phone:503-718-2603 The city cannot waive backflow testing requirements, as they protect Have a question about this report? public health. For more information Contact Tigard Environmental Program Coordinator Jennifer Joe at 503-718-2599 or visit the Oregon Health Authority jennifer@tigard-or.gov. Drinking Water Division. ZHabla Espanol? Este informe contiene informacion importante acerca de su agua potable.Haga que — 4 alguien to traduzca para usted,o hable con alguien clue to entienda. This report was printed on recycled paper with environmentally friendly inks.Please remember to recycle. G FREQUENTLYQUESTIONS Questions? �4&A H Your Water Bill? %%� about / Utility Billing..........503-718-2460 20 Water Quality? Jennifer Joe.............503-718-2599 Is fluoride added to our drinking water? recovery wells.The water from these wells jennifer@tigard-or.gov No.The Lake Oswego-Tigard Treatment has a hardness of approximately 80 ppm Water Conservation? Plant does not add fluoride to the water. (about 5 grains per gallon),which is deemed Kevin McCaleb........503-718-2591 Fluoride is a naturally occurring trace moderately hard. element in surface and groundwater.You Backflow Prevention? may want to consult with your dentist about How can 1 get my water tested? Hung Nguyen..........503-718-2603 Contact Tigard Public Works at hung@tigard-or.gov fluoride treatment to help prevent tooth 503-718-2591 for information about a free decay,especially for young children. Water Emergencies? lead-in-water testing kit.For more extensive Public Works...........503-718-2591 Is our water soft or hard? testing,private laboratories can test your tap Our water is very soft. Most of the year water for a fee.Not all labs are accredited to After-hours Water Emergencies? On-call Service........503-639-1554 the hardness ranges from 3-8 parts per test for all contaminants.For information million (ppm),or approximately%to%2 a about accredited labs,call the Oregon Health General Inquiries? grain of hardness per gallon.During the Authority,Oregon Environmental Laboratory Public Works............503-718-2591 summer,some customers receive a blend of Accreditation Program at 503-693-4122. groundwater from our aquifer storage and 8 1 2019 Water Quality Report • City of Tigard Water Division